Bolster.



H. W. ELVERSON.

HOLSTER.

APPMCATION FILED AUG.29,1912.

Patented Apr.. 6, 1915.

1HE NORRIS PETERS CO PHOTU-LITHQ, WASHINGTON, D C.

rn sauras HOWARD W. ELVERSON, 0F BELLEVUE, PENNSYLVANIA, ASSIGNOR TOPRESSED STEEL CAR COMPANY, OF PITTSBURGH, PENNSYLVANIA, .A CORPORATIONOF NEW JERSEY.

BOLSTER.

Specification of Letters Patent.

Patented Apr. 6, 1915.

T0 all whom it may concern Be it known that I, HOWARD W. ELvnRsoN, acitizen of the United States, residing at Bellevue, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Bolsters, of which the following is a full,clear, and exact description, such as will enable others skilled in theart to which it ap- Eertains to make and use the same, reference einghad to the accompanying drawings, which illustrate the preferred form ofthe invention, though it is to be understood that the invention is notlimited to the exact de tails of construction shown and described, as itis obvious that various modifications thereof will occur to thoseskilled in the art.

My invention relates to bolsters for trucks for railway cars, and moreespecially to that class of metallic bolsters which are built up ofsteel plates pressed to shape and then riveted together.

An advantage of the present invention is to provide an improvement inthe type of bolster which can be used in place of a cast steel bolster,where owing to the peculiar construction of the trucks, it hasfrequently been impossible to use pressed steel bolsters of sufficientstrength of the usual type, and so to a certain extent obtain theadvantage of both the cast steel and pressed steel bolster.

Another advantage of the present invention is to provide an improvementin the type of bolster which can be readily applied in place of caststeel bolsters to different types of truck with only minor changes, as

for instance, a bolster of certain capacity may have the central portionwhich is made of pressed steel, uniform in size and material for variousheights of cars, the only changes necessary being an alteration in theend extension members of the bolster'to suit the required conditions7thus adapting the bolster for interchange with bolsters already in use,so that trucks equipped with other forms of bolsters may be repairedwith my improved bolster.

Another advantage of the present invention is that the plurality ofsuperimposed trough shaped members formed of pressed steel are so unitedas to form a bolster in which the greater part of the riveting may bedone from the outside, with the exception of the rivets for securing thecenter brace member in the upper trough shaped member, which may beapplied before the lower trough shaped member is secured in position,and the rivets for securing the end extensions to the end of the pressedmember, which maybe also applied before the lower trough shaped memberis secured in position.

The invention consists in improvements in the type of bolster, thecentral portion of which is made of rolled or pressed steel and the endportions of cast material. The outline of the central portion issomewhat in the form of an inverted trough shaped member superimposedupon a lower trough shaped member, the adjacent portions of the membersbeing provided with outwardlyprojecting flanges or extensions which aresecured together. To the extremities of the trough shaped portions, endsin the form of castings are secured, forming extensions of the bolsterand providing seats for the springs and the usual column guides.

In the accompanying drawings illustrating my invention, in the severalfigures of which like parts are similarly designated, Figure l is a planview of a truck bolster constructed in accordance with my invention;Fig. 2 is a side elevation of the same, one end of the bolster beingshown in section taken on line 2-2 of Fig. l; Figs. 3, 4, 5 and 6 showmodifications of the end castings. Fig. 7 is an end elevation of thebolster, and Fig. 8 is a section through one 0f the end castings of line8 8 of Fig. 2.

The main body of the bolster consists of an inverted trough shapedmember l, preferably deeper at the center than at its ends andpreferably formed of a single plate of steel pressed to shape, althoughthis is not essential as it may be built up of two side members providedwith inwardly projecting flanges on its lower edges and a top plateriveted to said flanges. In either event, however, an inverted troughshaped member is formed. The lower edges of this member are providedwith longitudinal outwardly projecting flanges 2. The lower memberconsists of a trough shaped member 3 also preferably deeper at itscenter than at its ends and preferably formed of a single plate of steelpressed to shape. The upper edges of this member are provided withlongitudinal outwardly projecting flanges 4, which are adapted to besecured to the longitudinal projecting flanges 2 of the upper invertedtrough shaped member.

5 indicates a center brace, which may preferably be a malleable castingprovided with a vertical opening for the reception of the king pin. Thisbrace contacts with the top and side portions of the inverted troughshaped member l, and is riveted to the sides of said member by means ofthe flanges 6.

7 indicates the center bearing plate, and 8, 8 the side bearings, whichmay be of any suitable or preferred form.

Tov each end of the body portion of the bolster above described acasting 9 is riveted. This casting forms a seat for the springs 10, andis also provided with extensions for attachment to the body portions ofthe bolster. These extensions are shaped in such a manner as to fit andbe secured to the top and sides of the member 1 and to the end portionofV the member 3 as follows: The top portion 11 fits in and is rivetedto the under side of the top member 1 ,the vertical side portions 12 litinside and are riveted to the sides of the trough shaped member 1 andthe lower sloping portion 13 fits the upper side of the end ofthe lowertrough shaped member 3 and is riveted thereto.

To accommodate the springs 10 the portion 14 of the casting 9,constituting the spring seat is made hollow for the reception of theends of the springs, and it is shown in the drawings as being of greaterwidth Athan the portion engaging with the bolster body; but if necessarythis condition vmay be reversed and the portion engaging the bolster maybe wider than the end forming the spring seat.

In Fig. 2 of the drawings, the spring seat portion of the end castingvisshown on substantially the same level as the top of the end of thebolster. seat portion of the end casting is shown slightly below thelevel of the top of the end of the bolster and in Fig. l still fartherbelow the level of the top of the end of the bolster. In Figs. 5 and 6the spring seat portion of the end casting is shown in two differentplanes, both of them above the level of the top of the end of thebolster.

It will readily be seen that this range of adaptability, due to abilityto apply different forms of end castings, results in the advantage thatthis bolster can be readily applied to different heights of cars, theonly change necessary being lin the end casting.

Many minor changes in the construction and arrangement of myv inventionlcan 'be made and substituted'for those'hereinshown without in the leastdeparting from the 'i nature and Pl'iIlC'Ple of my' inventonfas In Fig.3 the spring' for instance, the extensions of the endv castings may bemade to lit the outer surfaces of the top, sides and bottom of thebolster body and in that manner be secured thereto.

What I claim is :Y

1. A car bolster comprising annverted trough shaped upper member and: atrough shaped lower member both of said members being deepest at theircentral portion and tapering thence toward their ends, and endextensions secured to said members.

2. A car bolster comprising an inverted trough shaped upper member and atrough shaped lower member'both of said members being deepest at theircentral portion .and tapering thence toward their ends, and endextensions secured to said members to form` spring seats. v

3. A car bolster comprising an inverted trough shaped upper member and atrough shaped lower member both of said members being deepest at theircentral portion and tapering thence toward their ends,l and endextensions secured to said members, said extensions havingrecesses forthe reception of the ends of the springs.

4. A car Lbolster comprisingy an invertedi'f" trough shaped upper memberand a trough shaped lower member both of said members being deepest attheir central portion and -taperingvthence toward their ends, andy endextensions projecting mside of said mem bers and securedA thereto.

5. A car bolster comprising an inverted trough shaped upper member and atrough shaped lower member both of said members being deepest at Vtheircentral .portion andl Y tapering thence toward their ends, and endextensions projecting inside of said Y' members andV secured thereto toform spring seats.

6. A box girder like bolster having` its shaped portion, said' portionshaving longitudinal outward projections secured to-f gether, and endextensions to form spring seats secured inside the end portions'of thebody members.

7 A bolster formed substantially as Va box girder and comprising anupper inverted trough shaped member and a lower trough shaped ymemberriveted together both of said members being deepest at their center,'andend extensions secured inside the ends of the box'girder member to'Vform spring seats# 8. A pressed steel bolster composed of an invertedtrough shaped top member, having longitudinal outwardly projectingflanges along the sides of its lower edges, a botat-their center, andend extensions secured tom trough shapedy member having compleJ-" insidethe ends of the bottom and top members to form spring seats.

9. A box girder like bolster comprising two trough shaped members,having lateral ianges riveted together both of said trough shapedmembers having a greater depth at their center, and end extensionssecured to the end portions of said trough [shaped members.

10. In a bolster the combination with a top member of an inverted troughshape and a bottom trough shaped member riveted thereto through themedium of laterally projecting longitudinal flanges both of said membersbeing deepest at their centers and tapering thence toward their ends,and end extensions secured to said trough shaped members.

1l. A car bolster comprising an inverted trough shaped upper member anda trough shaped lower member, one of said members being of greater depthat its center than the other member, and members securing said troughshaped members together and forming end extensions thereof.

In testimony whereof I aiix my signature in presence of two witnesses.

HOWARD W. ELVERSON.

Witnesses:

\ FRANK E. MILLER,

G. C. LAMBE.

Copies of this patent may 'ne obtained for ve cents each, by addressingthe Commissioner of Patents,v Washington, D. C.

